Adjustable core box



sept. 18, 1923.

, RAL-68,202 E. R. HILDEBRANDT ADJUSTABLE GORE Box Filed March 16. 1921 Patented Sept.Y 18, 1923.

, vireuvns'r n. HILDEBRANDT, or sfr. raunirrnnnsorn.

ADJUSTABLE conn nox.

Application led March 16, 1921. Serial No. 452,707.

tioning of the piston bosses and ring grooves Vmay be varied at will.

l@ In carrying out my invention I employ a core box and pattern formed with apbody portion and a sleeve of relatively thin material adapted to slide along said body portion with means for adjustably holding the same in fixed relation to said hody portion.

On' the core box I provide means for adjustably holding the. bosses in any adjusted position.` Y

The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularly pointed out in the claims.'` i j In the'drawings, illustratingV the application of my invention in one form Fig. 1 is a cross sectional view of a portion of a mold box showing the piston mold formed therein byvimeans of myinvention.

Fig. 2 isan elevational Vview of the pattern.

Fig. 3 is a cross sectional view of thepattern shown in Figure 2. Y v

' Fig. 4 is a plan view of the core box.

Fig. 5 is a vertical sectional view of the core box. j j

Fig. 6 is an end View of the pattern shown in Figure 3.

In Figure 1, I show the mold of a typical form of piston such as I desire to mold with my improvedpiston molding device. This 45' mold comprises an inner cavity 10 formed in the shape of the exterior of the piston and a core 11 having a core print 12 adapted` to lit into a corresponding depression 13vin themold proper, by means of which said core 11 is suspended Vinto the cavity10 as clearly indicated in Figure 1. The piston asindicated by the mold in Figure 1 is required to have-an enlarged portion 112 immediately adjoining its head 113 and to be provided with bosses15 and two rings 17 length and to be able to position the bossesV within said piston at any desired locality.

VIn my invention I perform these objects by constructing the parts comprising the pattern and core box of the piston adjustable so that the length of the piston and portion 112 and the positions of the boss may be varied at will without adding additional parts to the device so that each of these members is a complete unit in itself.

`The pattern for the piston which is clearly shown in Figs. 2 and 3 comprises a cylindrical head 18 which is preferably cast, and is turned with a cylindrical surface 19 and a square face 20 at the end thereof. Upon the exterior of surface 19 is adapted to slide a sleeve 21 formed of relatively thin sheet iron which is secured to a core print 22 as follows. The extreme end 23 of sleeve 2l. is adapted to project into a socket 24 formed in the lower portion of core print 22 as best indicated in Figure 3. Sleeve 21 is adapted to snugly lit this socket and is held in place by means cfa-n annular ring 26 adapted to lie adjacent the inner surface of the end 23 of said sleeve. The ring 26 is split transversely at 27 and is formed with a conical hole. A screw 28 is adapted to pass through the ring 26 at its point ofseverance 27 and through a wall 30, a core box and is providedwith a nut 31 positioned on the o'pposite side of wall 30 so that as the screw is rotatedland head 29 drawn towardswall 30 the ends of saidV ring V26 are spread apart causing the periphery of said ring to engage the portion 23 .of sleeve 21 and to force Vsaid sleeve against the soclreted cavity 24 in the end of core print 22. In this man-` nersleeve 21 is clamped within core print 22 so as to prevent removal of the same excepting by unloosening ring 26.

Head 18, which as before stated, is slidably mounted within sleeve 21, is adapted to be' advanced along said sleeve by means of a threaded rod 32 which can be screwed into a threaded neck 33 formed along the axis of the piston andv attached Yto the end 2O thereof. The threaded rod 32 .isformed with a shoulder-Sil and a threaded portion 35 which is adapted to pass through boss 36 formed at the center of core print 22 and to beV attached to Ysaid core print bymeans of a nut 37 screwed upon the protruding end of rod 32. The -rodr32is adapted Vto'be screwed into Ythe Vthreaded neck 33 Whiehis threaded throughout the entire length and is lprovided with Va plug 84 formed in the 'end thereof for the purpose of lreepingssand from entering the pattern when the same is in use and which also serves 'for forminga boss in the mold to be eastV on the piston. A cover plate 38 is seeured to the core printf 22 by means-of screws 39 and is af'da'fptedto conceal the nut'37 and the nut'l` by means of which the various parts are heldtogether andtojpresent: a smooth surface tothe j terior ofthe pattern.` In manipulatinn;` the devioe'rthe sleeve 2l andthe core prin-t'` 22 are; heldinonehand and headj18 rotated' relative thereto, the neck Sbeinpjserewed upon the threaded rod 52` causing the end20 'oft head 18 to Yadvan'ee or Vretreat asv'sa-id Vhead lsrotate'd.V In this manner' the length ofthe patternlmayibe' varied at' will to give anylength'offpiston without removing any portion ofthe'devieeorby inserting addi-A Y tional sectionsto the same.

After the headll has been rotate-df td-Y male the pattern of the desiredlength thev saine may be looked in place by' means 0f Vadevioe shown 1n Figures' `Band 6. VrIhe end oilithe rod is split toria por'tion ofv "its length ai; dO'and is also internally thread'- 'ed' at 4:1. Ytor a length to correspond with/the' slot 4 0. A taperedthreaded-'plug 42j is adapted to screw into the threaded portio'r l1 so 'asto cause the ends 'ot rod 32' toy spread ,as said plugi lis screwed into jtherod.` This causes the ends 'of ro'dBZto bind ag'ain'sttl'ie inner Walls of neel; 33 thereby firmly. holding' the 4headlf positioned onro'd 32 Within sleeve 21. In order to manipulate: this locking device' it 'isgmerely'necessary tore;

' haiil of the core is Ina-de at one time.

move the plug 34 andinsert asorewv driverl through they neolr 33t() engagev the; plug 442. ftter the head has been properly,positioned in the looking device saidv plug 34: mayagain be replaced making the device ready for use.v YIn conjunction with the pattern' above desoribedl employ a eore ,borv having. simi-f laradjustable features"Whichis shown in detail in I `igures t and The eore box is u'iade with a body portion 43 which' is made to Contorni to the surface ot'the interior 'o-l the piston and is so vconstructed that only This body portion is provided with legs t( and so that the core box may sta-nd onfa table to permit the operator to readily fill'the same with the core sand. Body 43 Vas is shown is semi-cylindrical throughout its.

lengthexeepting'at 4:6 Wherel the same is formed with an enlarged head adapted; to form the core print`12 When the oorev is formed. 'A cover plate et? is'fastenedonto head 116 by means of screws 48 which serves lthrough a longitudinalslot Y 'stantiallyalong the entire bottom o-t body member 13, fan-d another: longitudinal' slotY ,bottom member f il mounted a partition 49 which is adjustablyV to form theend of lsaid core print." Within i Vthecylindrical*body portiond?) is slidaloly positioned on a semi-Cylindrical sleeve. por

tion 50.` Byproperly positioning said partition on the lsleeve portion 50 a'protrusion:

Withinthe Asaine at one end may beprovided asindioated at 5l, Whiehiorms the enlarged portion l2-ot the piston proper; Partitions i9 and memherO are adapted to be clamped to body member 43 by means of a machine screw 52'hav'ing a eounter'sunlr` head whichV passesjthrough said partition- 2U() i'forn'iedalong` th 50.` A nut V54: soreiv d upon the endotser'ew V53 servesv to` clampV partition 49 and sleeve'() in any position relative to ea'eh other upon the semi-cylindrical body 'mem-VV ber in any position alongthe'same; In

this manner thelength of theeore may be- Y Y properly 4adjusted in relation to; the fleng'th securing the partition 419.' vslidink boss along slot 53 the positionV of Athisbossy relative to fthe head ot the lcylinder can he' varied at Wilh To cover u1' theY slot-S be, tween theboss 55 and sleeremember 51 and between said boss and thefcore print of bosses in the 'cylinder IV '9,5:

member` 49', i formed sub# this device I providetvofstrips-of. sheetl i iron 58 and59`whieh are adapted Vtio-loe -inserted between the body member 43 and the boss 55 in `Sleeve `51 so, as to be iirinly clamped in place as these members Yare/secured in position upon the'hody portion'43. As' the core isV illed leakageotthe same through slot 53 is hence" prevented by Athese tivo devices; Infmolding. pistonsl Iftind` it advisable to make the core in Atwohalvesandl to paste these two f halves together.- y For this purpose I have 'showvn-my-oore boxl asV eo'mprisingone halt onlyfthou'eh it can be Yreadily understood that it it Were desired Ato make the core box in twopieces anotherY `halt could be'added totheboxesimilar to thls one'and the two secured or` elamp'ed'rftogether. e

In usingmy inventionthelpattern is first-f adjusted` to the proper length and `a1nold` made of 1t ma moldboXV-ot ordinary con-A struction not shoivn inI the Y drawing-5,'y Withv the parting` lineot the mold. @Oras indi eatediirFig-uregl. As thesleeve 21 is por sltioned outside Vof head 18 it can be easily manifest.

seenthat thepattern can readily be vvith-l erly spaced from the exterior Wall oi the moldy so as to give thepiston .the desired form and thickness.

The advantages .ofV my inventiondare A single core box and pattern are i `required for any diameter ot piston which maybe adjusted Vto any length of piston with any location oit boss Within the saine Without dismounting the entire structure and Withoutv the removal or addition' ot additional parts. in the ordinary form of adjustable core box in which a number of sections are used it becomes necessary to have :i great number of parts due to the number of com binations necessary to handle all lengths oi pistons varying by small fractions ot an inch. Vith such devices the cost becomes prohibitive. With my invention l require sitioning of the bosses Within the saine may be varied by any amount desired. I

In accordance With the patent sta-tutes I have described the principles ot operation ot my invention, together with Vthe apparatus which l novv considerV to represent the best embodiment thereof, butl, desire Jto-fhave it understood that the construction Vshown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set 'forth Within the scope of the following claims.

l claim:

i. A piston molding` device comprising a soclreted coverinember, a sleevepositioned Within said socketed member, a head slidably mounted Within said sleeve, an operating member i-'or sliding said head passingr through said coverrmember, means attachable upon the end ot said operating menibeiv for securing,` the same to said cover member, a flange formed on said cover membei', and a plate positioned on said iiange for concealing' said securing means.

2. A piston molding device comprising' an outer sleeve, an inner sleeve slidable Within said outer sleeve, an end blorlY slidable Within said inner sleeve, and means 'for simultaneously locking-both ot said sleeves and said end block in any oic their adjusted positions.

3. A piston moldingdevice comprising a sleeve, head slidably mounted Within said sleeve for varyingr the leiigtlifot'the pistorn' and means tor holding;` said head in locking'V position ivithinthe sleeve.

.lpi'. piston u ioldiufj devine comprising- "a sleeve, a head `slidably-mountedivitliin said sleeve 'tor varying the length ol the pistou.`

means for holding said head in locking position Within the sleeve, and awovei' 2member adapted to'be secured to .said sleeve .tor clesi'nn the en'df thereot.

5. A piston'molding device comprising' :i

sleeve, a cover member secured to i! sll ve at one `end thereof, a. head adapnl to slid ivithinsaid sleeve, a screw secured lo saicove'r and a threaded portiondormed on sari head adapted to be screwed alongp said screw as the head is rotated Within said sleeve, and means for loclting'the end ot said screw Within the threaded portion ot said head.

6, A piston molding' device comprising; a sleeve, a cover member 'tor said sleeve having` a socketed depression Within the same, said sleeve being; adapted to iit into said soc-listed depression, a split annular :nember adapted to be positioned ivithin said sleeve, and means tor spreading said split annular member apart to clamp the sleeve against the Walls oi' said socketed cover member.

7. A piston molding` device comprising a sleeve, a cover member for said sleeve havin), a socl-:eted depression Within the same, said sleeve being adapted to t into said soclreted depression and means tor clamping said sleeve against the Walls oi" said soclfeted rover member. V

8. A piston'molding` device comprising' a sleeve,a cover member secured to said sleeve at one end thereof, a head adapted to slide Within said sleeve, a screvv secured to said cover and a threaded portion 'Formed on said'head adapted to be screwed along; said screw as the head is rotated Within said sleeve, and means tor spreading' apart the end of said screws to cause the saine to bind Within the threaded portion ot said head.

9. A piston moldingdevice comprisingl a sleeve, a. longitudinal slot 1formed along said sleeve, a head slidably mounted Within said sleeve, means it'or guiding; and locking said head in any position along said slot.

10. A piston molding device comprising` an outer sleeve, a longitudinal slot extendin i through said sleeve, an inner sleeve. a longitudinal slotextendinn through said inner sleeve tor a portion ot thelenp'tli thereot, and registering; with said outer sleeve slot, an end block .slidably mounted within said inner sleeve and a bolt passing through said end block. and through both of said sleeve slots for clampingl said sleeves and end block together in any oi their adjusted positions.

' ll. A piston molding device comprising` an outer sleeve, a longitudinal slot extendm-Sleever'sloh am end block *mthm sind muet. Sleeve and a Vboltpasemg ing through Said sleeve', :winner sleeve, a longltudmal Vslot extendmgrthrough smd inner sleeve for a portien of the length thereof, V"and,per'fgs;@ring with said Outer shdebly *mounted 'lifo'ugh, Suid end b]A erkend. through beth olsad sleeve slots `'for clamping. said sleeves.

and end blocks teget-her-in :my of their adjusted pos1t10ns7'enda cover memberV for closing tbeporton ofV 5.153211 Slet pestoneeVv Within Sayid mold.

12. A plsto-n moldmg (levlce eomprlsmg a sleeve, a'slot'formed 1n sind Sleeve and passing through the same, a member SVldrable Within rabe-"sleeve 2ndV secilel tolrthe Sa-nie sleevea-slt formed said sleeve Vendpeeei Y mg; through; the same, L Vmember jslrdable,

adapted teelfse thepertrr; Vef Said 'slotfpo-f sitioned within the mold; saidA @overmem-V "ber being adaptedtowbe elzfmped between saidrsleeve and. Said sldable member.

\ RJILDEBRDT 

